nuno borges carvalho passive backscatter sensors for iot...
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Passive Backscatter Sensors for IoTapplications
Nuno Borges Carvalho
Ricardo Correia
Daniel Belo
Felisberto Pereira
IT- DETI – Universidade de Aveiro (nbcarvalho@ua.pt)
Motivation
Page 2
Present Io“Things” Near future Io“Things”
IT- DETI – Universidade de Aveiro (nbcarvalho@ua.pt)
Motivation
Page 3
IT- DETI – Universidade de Aveiro (nbcarvalho@ua.pt)
Motivation
Page 4
from
QU
ALC
OM
M
IT- DETI – Universidade de Aveiro (nbcarvalho@ua.pt)
Motivation Energy waste in IoT
Page 5
http://edna.iea-4e.org Source: 2016 data
Standby Energy
Battery Manufacturing
One battery per IoT device and replaced every 2nd year
IT- DETI – Universidade de Aveiro (nbcarvalho@ua.pt)
Motivation Energy waste in IoT
Page 6
Standby Energy
Batteries take hundreds of years to decompose, posing a serious threat to the public health and
to the environment.
IT- DETI – Universidade de Aveiro (nbcarvalho@ua.pt)
Market Solutions Power Consumption
Page 7
Type AAA CR2032 CR123A CR2
Material Alkaline LiMn02* Lithium Lithium
Voltage 3V 3V 3V 3V
Capacity 500 mAh 225 mAh 1500 mAh 800 mAh
0
10
20
30
40
50
60
0 50 100 150 200 250 300 350
Yea
rs
Transactions per day
AAA CR2032 CR123A CR2
IT- DETI – Universidade de Aveiro (nbcarvalho@ua.pt)
Energy harvesting sources
Page 8
Wi-Fi
Radio and TV broadcast
GSM/Cellular
IT- DETI – Universidade de Aveiro (nbcarvalho@ua.pt)
The Solution
Page 9
Backscatter
communications
Wireless Power
Transmission
Energy
Harvesting
LoRa – 60 mW to 400 mW Bluetooth – 5 mW to 90 mW WiFi – 50 mW to 1 W
• Remove the need of power for transmit / receive!
• Eliminate batteries!
Passive
IT- DETI – Universidade de Aveiro (nbcarvalho@ua.pt)
Page 10
Backscatter
communications
Wireless Power
Transmission
Energy
Harvesting
SWIPTSimultaneous Wireless Information and Power Transfer
IT- DETI – Universidade de Aveiro (nbcarvalho@ua.pt)
Our Solution – SWIPT backscatter
Page 11
Low Cost SDR Readers
Dummy Wireless Power Transmitters
Passive Sensors
IT- DETI – Universidade de Aveiro (nbcarvalho@ua.pt)
Backscatter Battery-less Paradigm
12
IT- DETI – Universidade de Aveiro (nbcarvalho@ua.pt)
Towards the FUTURE!!
Page 13
Passive Sensors Increase Data rate
Increase data rate and
enable WPT capabilities
2015 2017 2018 20192016
Increase frequency and
decrease size
Total size = 0.92 mm2
kbit/s Gbit/s
IT- DETI – Universidade de Aveiro (nbcarvalho@ua.pt)
14
Backscatter ambient backscatter
Spyridon N Daskalakis et all, “Spectrally Efficient 4-PAM Ambient FM Backscattering for Wireless
Sensing and RFID Applications”, to be presents in the next IMS2018 in Philadelphia
IT- DETI – Universidade de Aveiro (nbcarvalho@ua.pt)
mmWave low power connectivity – Applications & Investors
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• Glaucoma
• Diabetes (track the blood
sugar levels – measure
glucose)
Extremely small, low power and cheap connectivity solution which can be embedded in every object
IT- DETI – Universidade de Aveiro (nbcarvalho@ua.pt)
Page 16
Thank you very much for your attention
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